I have said before that if I had to kill my own meat, I would be a vegetarian. Actually, my DH would have no problem killing animals to eat. They raised chickens when he was growing up and killed/clean/processed it themselves. The only other animals they raised were rabbits and those were sold as meat pins (sp?) assuming the rabbit won the contest. He grew up on a working farm (but not animal farm...corn, wheat, beans...what else does one grow in Ohio..) The first time I ever met DH he told me about how they killed chickens. Not sure why he thought that would impress me (it didn't, it grossed me out.) My BIL used to raise a calf every year for meat. I am not sure when he stopped doing it, but he now "owns"a pig farm (he owns the barn and takes care of the pigs, but doesn't technically own the pigs.)
Though my kids haven't seen an animal butchered (I have not either), I do make sure they know that their meat comes from dead animals. But I admit that I need the psychological distance between me and the meat I eat.